Book Image

Mastering PostgreSQL 9.6

By : Hans-Jürgen Schönig
Book Image

Mastering PostgreSQL 9.6

By: Hans-Jürgen Schönig

Overview of this book

PostgreSQL is an open source database used for handling large datasets (Big Data) and as a JSON document database. It also has applications in the software and web domains. This book will enable you to build better PostgreSQL applications and administer databases more efficiently. We begin by explaining the advanced database design concepts in PostgreSQL 9.6, along with indexing and query optimization. You will also see how to work with event triggers and perform concurrent transactions and table partitioning, along with exploring SQL and server tuning. We will walk you through implementing advanced administrative tasks such as server maintenance and monitoring, replication, recovery and high availability, and much more. You will understand the common and not-so-common troubleshooting problems and how you can overcome them. By the end of this book, you will have an expert-level command of the advanced database functionalities and will be able to implement advanced administrative tasks with PostgreSQL.
Table of Contents (14 chapters)
Free Chapter
1
PostgreSQL Overview

Introducing grouping sets

Every advanced user of SQL should be familiar with GROUP BY and HAVING clauses. But are you also aware of CUBE, ROLLUP, and GROUPING SETS? If not, this chapter might be worth reading for you.

Loading some sample data

To make this chapter a pleasant experience for you, I have compiled some sample data, which has been taken from the BP energy report: http://www.bp.com/en/global/corporate/energy-economics/statistical-review-of-world-energy.html.

Here is the data structure that will be used:

test=# CREATE TABLE t_oil ( 
region text,
country text,
year int,
production int,
consumption int
);
CREATE TABLE

The test data can be downloaded from our website using curl directly:

test=# COPY t_oil...